v1.0.0

infra/conf/serial/loader.go

@@ -0,0 +1,82 @@
+package serial
+
+import (
+	"bytes"
+	"encoding/json"
+	"io"
+
+	"github.com/xtls/xray-core/v1/common/errors"
+	"github.com/xtls/xray-core/v1/core"
+	"github.com/xtls/xray-core/v1/infra/conf"
+	json_reader "github.com/xtls/xray-core/v1/infra/conf/json"
+)
+
+type offset struct {
+	line int
+	char int
+}
+
+func findOffset(b []byte, o int) *offset {
+	if o >= len(b) || o < 0 {
+		return nil
+	}
+
+	line := 1
+	char := 0
+	for i, x := range b {
+		if i == o {
+			break
+		}
+		if x == '\n' {
+			line++
+			char = 0
+		} else {
+			char++
+		}
+	}
+
+	return &offset{line: line, char: char}
+}
+
+// DecodeJSONConfig reads from reader and decode the config into *conf.Config
+// syntax error could be detected.
+func DecodeJSONConfig(reader io.Reader) (*conf.Config, error) {
+	jsonConfig := &conf.Config{}
+
+	jsonContent := bytes.NewBuffer(make([]byte, 0, 10240))
+	jsonReader := io.TeeReader(&json_reader.Reader{
+		Reader: reader,
+	}, jsonContent)
+	decoder := json.NewDecoder(jsonReader)
+
+	if err := decoder.Decode(jsonConfig); err != nil {
+		var pos *offset
+		cause := errors.Cause(err)
+		switch tErr := cause.(type) {
+		case *json.SyntaxError:
+			pos = findOffset(jsonContent.Bytes(), int(tErr.Offset))
+		case *json.UnmarshalTypeError:
+			pos = findOffset(jsonContent.Bytes(), int(tErr.Offset))
+		}
+		if pos != nil {
+			return nil, newError("failed to read config file at line ", pos.line, " char ", pos.char).Base(err)
+		}
+		return nil, newError("failed to read config file").Base(err)
+	}
+
+	return jsonConfig, nil
+}
+
+func LoadJSONConfig(reader io.Reader) (*core.Config, error) {
+	jsonConfig, err := DecodeJSONConfig(reader)
+	if err != nil {
+		return nil, err
+	}
+
+	pbConfig, err := jsonConfig.Build()
+	if err != nil {
+		return nil, newError("failed to parse json config").Base(err)
+	}
+
+	return pbConfig, nil
+}